EP0873386A1 - Procede de traitement de la surface metallique d'une tole - Google Patents
Procede de traitement de la surface metallique d'une toleInfo
- Publication number
- EP0873386A1 EP0873386A1 EP96942385A EP96942385A EP0873386A1 EP 0873386 A1 EP0873386 A1 EP 0873386A1 EP 96942385 A EP96942385 A EP 96942385A EP 96942385 A EP96942385 A EP 96942385A EP 0873386 A1 EP0873386 A1 EP 0873386A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- stamping
- treatment
- deposit
- oiling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 title claims description 22
- 239000002184 metal Substances 0.000 title claims description 22
- 238000004381 surface treatment Methods 0.000 title description 18
- 238000005260 corrosion Methods 0.000 claims abstract description 26
- 230000007797 corrosion Effects 0.000 claims abstract description 25
- 239000004166 Lanolin Substances 0.000 claims abstract description 13
- 229940039717 lanolin Drugs 0.000 claims abstract description 13
- 235000019388 lanolin Nutrition 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000011282 treatment Methods 0.000 claims description 86
- 239000000243 solution Substances 0.000 claims description 34
- BQPPJGMMIYJVBR-UHFFFAOYSA-N (10S)-3c-Acetoxy-4.4.10r.13c.14t-pentamethyl-17c-((R)-1.5-dimethyl-hexen-(4)-yl)-(5tH)-Delta8-tetradecahydro-1H-cyclopenta[a]phenanthren Natural products CC12CCC(OC(C)=O)C(C)(C)C1CCC1=C2CCC2(C)C(C(CCC=C(C)C)C)CCC21C BQPPJGMMIYJVBR-UHFFFAOYSA-N 0.000 claims description 32
- CHGIKSSZNBCNDW-UHFFFAOYSA-N (3beta,5alpha)-4,4-Dimethylcholesta-8,24-dien-3-ol Natural products CC12CCC(O)C(C)(C)C1CCC1=C2CCC2(C)C(C(CCC=C(C)C)C)CCC21 CHGIKSSZNBCNDW-UHFFFAOYSA-N 0.000 claims description 32
- XYTLYKGXLMKYMV-UHFFFAOYSA-N 14alpha-methylzymosterol Natural products CC12CCC(O)CC1CCC1=C2CCC2(C)C(C(CCC=C(C)C)C)CCC21C XYTLYKGXLMKYMV-UHFFFAOYSA-N 0.000 claims description 32
- FPTJELQXIUUCEY-UHFFFAOYSA-N 3beta-Hydroxy-lanostan Natural products C1CC2C(C)(C)C(O)CCC2(C)C2C1C1(C)CCC(C(C)CCCC(C)C)C1(C)CC2 FPTJELQXIUUCEY-UHFFFAOYSA-N 0.000 claims description 32
- BKLIAINBCQPSOV-UHFFFAOYSA-N Gluanol Natural products CC(C)CC=CC(C)C1CCC2(C)C3=C(CCC12C)C4(C)CCC(O)C(C)(C)C4CC3 BKLIAINBCQPSOV-UHFFFAOYSA-N 0.000 claims description 32
- LOPKHWOTGJIQLC-UHFFFAOYSA-N Lanosterol Natural products CC(CCC=C(C)C)C1CCC2(C)C3=C(CCC12C)C4(C)CCC(C)(O)C(C)(C)C4CC3 LOPKHWOTGJIQLC-UHFFFAOYSA-N 0.000 claims description 32
- CAHGCLMLTWQZNJ-UHFFFAOYSA-N Nerifoliol Natural products CC12CCC(O)C(C)(C)C1CCC1=C2CCC2(C)C(C(CCC=C(C)C)C)CCC21C CAHGCLMLTWQZNJ-UHFFFAOYSA-N 0.000 claims description 32
- QBSJHOGDIUQWTH-UHFFFAOYSA-N dihydrolanosterol Natural products CC(C)CCCC(C)C1CCC2(C)C3=C(CCC12C)C4(C)CCC(C)(O)C(C)(C)C4CC3 QBSJHOGDIUQWTH-UHFFFAOYSA-N 0.000 claims description 32
- 229940058690 lanosterol Drugs 0.000 claims description 32
- CAHGCLMLTWQZNJ-RGEKOYMOSA-N lanosterol Chemical compound C([C@]12C)C[C@@H](O)C(C)(C)[C@H]1CCC1=C2CC[C@]2(C)[C@H]([C@H](CCC=C(C)C)C)CC[C@@]21C CAHGCLMLTWQZNJ-RGEKOYMOSA-N 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000010410 layer Substances 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 9
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 claims description 8
- 239000003352 sequestering agent Substances 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- -1 fatty alcohol esters Chemical class 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 235000012000 cholesterol Nutrition 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229930182558 Sterol Natural products 0.000 claims description 3
- 150000002191 fatty alcohols Chemical class 0.000 claims description 3
- 150000003432 sterols Chemical class 0.000 claims description 3
- 235000003702 sterols Nutrition 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 14
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 52
- 238000000151 deposition Methods 0.000 description 20
- 230000008021 deposition Effects 0.000 description 18
- 230000001681 protective effect Effects 0.000 description 18
- 229910019142 PO4 Inorganic materials 0.000 description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 15
- 239000010452 phosphate Substances 0.000 description 15
- 230000006872 improvement Effects 0.000 description 12
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 10
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 6
- 238000004383 yellowing Methods 0.000 description 6
- 238000000469 dry deposition Methods 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 229910000160 potassium phosphate Inorganic materials 0.000 description 5
- 235000011009 potassium phosphates Nutrition 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008397 galvanized steel Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 241000282485 Vulpes vulpes Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000007928 solubilization Effects 0.000 description 2
- 238000005063 solubilization Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000012432 intermediate storage Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
- C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
- C10M107/34—Polyoxyalkylenes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/01—Emulsions, colloids, or micelles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
- Y10T428/31692—Next to addition polymer from unsaturated monomers
Definitions
- the invention relates to a method for treating the metal surface of a sheet, in particular a steel sheet, intended for preparing said sheet for stamping and / or for protecting it against corrosion, in which a aqueous solution of treatment product on said surface, said surface is dried, then at least one oiling operation is carried out on said surface
- Patent EP 0 489 105 B1 describes a process of this type in which the treatment product comprises an water-soluble salt of an alkali metal, in particular potassium phosphate
- a potassium phosphate solution is therefore applied to its surface, then the applied solution is dried, the application and drying conditions are adapted to obtain a phosphate deposit of surface density between 5 to 40 mg / m2 Then, after this deposit, at least one oiling operation is carried out on the surface (covered with this deposit)
- the sheet thus treated is then ready to enter the forming tool (for example a stamping press).
- this surface treatment phosphating and oiling
- this surface treatment must be performed on a clean metal surface, and it is sometimes necessary to clean the surface of the sheet before applying the treatment solution
- the preparation of a sheet for stamping comprises at least two operations, one of depositing a treatment product ( phosphate), the other of oiling
- the sheets After storage, the sheets can therefore be stamped, generally by means of a second oiling, or re-oiling of lubrication.
- the object of the invention is to limit these drawbacks while proposing a surface treatment which offers both good corrosion resistance and good lubrication, even with a single oiling operation.
- the subject of the invention is a method of treating the metal surface of a sheet, in particular of a steel sheet, intended to prepare said sheet for stamping and / or to protect it against corrosion, in which apply an aqueous solution of treatment product to said surface, dry said surface, then perform at least one operation of oiling said surface, characterized in that
- the treatment product contains polyethoxylates of one or more lanolin derivatives, said derivatives being sterols or fatty alcohol esters, the drying conditions are adapted to obtain a deposition in the dry state of the product of treatment on said surface, said deposit being considered to be in the dry state if it no longer contains or almost no more water of composition, - And at least one oiling operation is carried out by applying a non-water-soluble oil to said deposit, always in the dry state.
- Lanolin is a fatty substance of animal origin.
- the grease itself comes from washing sheep's wool; suintin is usually considered as a wax mainly comprising esters of fatty alcohols of the cholesterol, isocholesterol and lanosterol type combined with saturated fatty acids having a number of carbon atoms greater than 23.
- non-water-soluble oil means a homogeneous oily phase as opposed, in particular, to aqueous oil in water emulsions.
- Said lanolin derivatives are chosen from fatty alcohols such as lanosterol, cholesterol, isocholesterol and fatty acids and esters derived from lanolin.
- polyethoxylates correspond to the general formula DO- (CH2- CH2-O) n -H, n is between 30 and 150, and is preferably equal to approximately 75 or n is chosen so that said polyethoxylates have a balance hydrophilic-lipophilic (commonly called HLB) at least 14 (on a scale between 0.1 and 20).
- HLB hydrophilic-lipophilic
- aqueous solution of treatment product contains at least one sequestering agent with respect to iron ions.
- HLB Hydrophilic Lipophilic Balance
- the subject of the invention is also a sheet, in particular a steel sheet, treated according to the invention, characterized in that its metal surface is coated with two superimposed and distinct layers, an intermediate layer containing said treatment product and a layer oil surface.
- the thickness of said intermediate layer is less than 1 ⁇ m and its surface density is greater than 100 mg / m2.
- the subject of the invention is also a method of stamping a metal sheet, in particular of steel, in which said sheet is prepared by a process according to the invention and then, strictly speaking, said sheet is pressed to shape it, characterized in that: - a single so-called oiling operation is carried out before shaping,
- the time interval separating said single oiling operation from the actual drawing operation is greater than one day.
- This time interval corresponds to a storage period during which the sheet treated according to the invention is effectively protected against corrosion by the double layer of treatment product and oil; it is this same double layer which is used to lubricate the sheet metal-stamping tool interface during the forming operation at the end of the storage period.
- said time interval - or storage period of the treated sheet - is greater than one month.
- FIGS 1 to 3 represent curves A, B, C of results of tribological tests for different test pieces, with, on the ordinate the coefficient of friction k (from 0 to 0.3), and on the abscissa, the clamping force F s (expressed in decaNewton - daN - from 200 to 2000 daN in intervals of 360 daN) for Figures 1 and 3 or the friction stroke D (expressed in mm - from 0 to 180 mm) for Figure 2.
- FIGS 4, 5 and 6 show, each for a type of test piece, the results of tribological tests immediately after treatment (A) and 30 days after treatment (B), with, on the ordinate, the coefficient of friction k (of 0 to 0.3), and on the abscissa, the clamping force F s (expressed in decaNewton - daN - from 200 to 2000 daN).
- - Figure 8 shows the results of tribological tests on steel specimens treated according to the invention for different surface densities of prior deposition of ethoxylate (curves A to D), with, on the ordinate, the coefficient of friction k (of 0 to 0.3) and, on the abscissa, the clamping force F s (expressed in decaNewton - daN - from 200 to 2000 daN).
- - Figure 9 shows results of tribological tests according to the same conventions as Figure 8, the curve S1 on a sample whose prior deposition has not been dried according to the invention, the curve S2 on a sample whose deposition was dried according to the invention.
- An aqueous solution of treatment product is prepared by dissolving lanosterol polyethoxylate in water, said polyethoxylate corresponding to the general formula DO- (CH2-CH2-O) n -H, D-OH representing lanosterol.
- the number of "ethylene oxide” radicals per molecule of polyethoxylate product is between 30 and 150, in particular of the order of 75.
- the number of “ethylene oxide” radicals per molecule of polyethoxylate product is adapted so as to obtain a polyethoxylate having an HLB index at least equal to 14 (hydrophilic-lipophilic balance - scale from 0.1 to 20).
- the concentration of polyethoxylates in the solution is adjusted in a manner known per se, the conditions of application of said solution on the sheet to be treated and the drying conditions to obtain a deposit with a thickness of less than 1 ⁇ m on prison.
- the surface density of the treatment product deposit is advantageously between 300 to 400 mg / m2.
- the treatment solution is easy to handle, to apply and to dry on the sheet, since it is an aqueous solution.
- the concentration of polyethoxylates in the solution is between 0.5 and 10% by weight.
- the concentration of polyethoxylates in the treatment solution is approximately 4%.
- an antioxidant for example, one can also add to the solution an antioxidant, a preservative (or bactericide) and an anti- foam in proportions which are adapted in a manner known per se, these additives having no significant effect on the performance of the surface treatment according to the invention.
- the surface treatment according to the invention is then carried out: - the aqueous treatment solution is applied to the metal surface of the sheet to be treated,
- a treated sheet is obtained, the treatment according to the invention comprising the deposition of an intermediate layer of lanosterol ethoxylates and of a surface layer of oil.
- aqueous solution it is possible, for example, by soaking or by spraying.
- hot air can be used.
- Lanosterol ethoxylates are very hygroscopic: exposed to a humid atmosphere, they can regain up to 100% of their weight in water in a fairly short time (in about ten minutes).
- This water uptake corresponds to adsorption water, as opposed to water of composition.
- the drying must be carried out so as to eliminate all (or almost all) the water of composition (that is to say the water provided by the solution of product of treatment) but by necessarily so as to eliminate the adsorption water.
- a lubricating oil which is not water-soluble, in particular not dissolved or dispersed in water.
- the sheet is maintained at a temperature of at least 45 ° C., which facilitates the maintenance of the deposition of lanosterol ethoxylate in the dry state.
- the sheet treated according to the invention dry deposition of lanosterol ethoxylates + oiling
- the sheet treated according to the invention has much better tribological properties than a sheet simply oiled without prior surface treatment. These tribological performances are superior to those of a sheet treated according to the prior art, in particular by deposit of phosphate then identical oiling.
- the sheet thus treated dry deposition of lanosterol ethoxylates + oiling
- phosphate deposit + oiling dry deposition of lanosterol ethoxylates + oiling
- a protective oil known per se is applied to provide resistance corrosion.
- the protective oils which are generally used are not water-soluble and it is important, in the treatment according to the invention, to use precisely non-water-soluble oils, which excludes the use of oil emulsions in the water. It is then found that the sheet treated according to the invention (deposit of lanosterol ethoxylates + protective oil against corrosion), is much more resistant to corrosion than a sheet treated with a phosphate solution and oiled in the same way.
- lanosterol ethoxylates according to the invention is therefore much more compatible with protective oils than treatments of the prior art, in particular based on phosphate.
- the deposition of lanosterol ethoxylates according to the invention therefore does not interfere with the protection provided by the oil.
- the sheets treated according to the invention do not need to be re-oiled just before stamping, even after a prolonged storage period. : we can therefore perform only one single oiling operation between the exit from the manufacture of the sheets (for example, pickling exit) and their shaping by stamping, and the sheet is protected against corrosion in the time interval separating the single operation from the oiling of the actual stamping operation In conventional industrial operations, this time interval is generally greater than one day and represents the intermediate storage period
- the number of "ethylene oxide" radicals per molecule of polyethoxylate product is sufficiently high to prevent the solubilization of the treatment product in oil, but must remain sufficiently low so that the deposition in the dry state is not too hygroscopic
- lanosterol is ethoxylated (too many "ethylene oxide” radicals) to the point of risking dissolving the oil in an aqueous phase (which would correspond to an emulsifier function).
- An additional advantage of the invention is that the products diluted in the treatment solution, namely the polyethoxylates of lanolin derivatives, do not present any risk with respect to the environment or to human health.
- the sheets treated according to the invention can be easily spot welded.
- the sheets treated according to the invention may have a tendency to yellow slightly on the surface, in particular in the case where the intermediate dry deposition of ethoxylate comprises water. adsorption.
- the intermediate dry deposition of ethoxylate comprises significant amounts of adsorption water, in particular when very thorough drying is not carried out (limited simply to the evaporation of the water of composition), or when the deposit adsorb water before oiling (case where the sheet is allowed to cool in a humid atmosphere before oiling).
- chelating or sequestering agents are added to the treatment product solution according to the invention, in particular with respect to iron ions (Fe 2+ , Fe 3+ ).
- the invention also applies to steel sheets coated with metal, such as galvanized sheets.
- the invention also extends to cases where, in particular with the aim of further improving the tribological properties, a second oiling operation is carried out at the end of the storage period and just before stamping proper; in this case always avoid using water-soluble oils.
- the invention also extends to cases where, in particular in order to further improve the corrosion resistance provided by the treatment according to the invention, at least one corrosion inhibitor is added to the solution of treatment product based on lanosterol ethoxylate.
- at least one corrosion inhibitor is added to the solution of treatment product based on lanosterol ethoxylate.
- a solution of treatment product is applied to steel test pieces which are then dried with hot air, a test piece coated with a dry deposit of treatment product is thus obtained, then an oil film is applied to the dry deposit.
- treatment product - either, according to the invention, lanosterol polyethoxylates having an average number m of ethylene oxide radicals
- X 'denotes the product for which m 30 and the associated surface treatment
- the HLB index of product X ' is approximately 14 in a scale of 0.1 to 20, 0.1 corresponding to a very lipophilic product and 20 corresponding to a very hydrophilic product
- the deposition of treatment product is carried out under the drying conditions mentioned above in the general description of the invention, that is to say that it is dried at least until substantially all the water of composition present in the layer of treatment solution applied to the test piece
- the treatment product thus deposited on the test piece before oiling represents a load of the order of 300 mg / m2, which in any case corresponds to a thin film with a thickness of less than 1 ⁇ m Unless otherwise stated, the film of oil applied to the dry deposit of treatment product corresponds to a load of approximately 2 g / m2
- the oiling is carried out directly after drying, which prevents the deposit from absorbing large quantities of water.
- This example is to illustrate the improvement brought by the surface treatment according to the invention on the coefficient of friction of said surface.
- This example also aims to illustrate that the tribological performances brought by the treatment according to the invention do not depend on the type of oil used (protective oil or stamping oil)
- the test specimens are oiled and the applied oil load is of the order of 2 g / m2
- test device is a plane-plane t ⁇ bometer of a type known in itself
- test pieces to be tested are clamped according to a clamping force F s between two high-speed steel plates providing a support (or sliding) surface on the test pieces of 1 cm 2
- the coefficient of friction k is measured while moving the test piece with respect to the inserts over a total stroke D of 180 mm and at the speed of 2 mm / s, according to two types of procedure
- A, B, C denote the curves respectively (A) for a test piece without treatment, (B) for a test piece with treatment P and (C) for a test piece with treatment X according to the invention
- Figures 1 and 2 correspond to tests of samples oiled with a protective oil (80 21 from QUAKER), Figure 3 to tests of samples oiled with a protective oil stamping (V14 from FUCHS)
- the treatment according to the invention provides a very significant improvement in the tribological properties since the coefficient of friction of the metal of the test piece is approximately divided by 2 compared to the metal treated according to the prior art (phosphate deposit + oiling), and by 3 compared to directly oiled metal
- the friction coefficients of the test specimens treated according to the invention are comparable, whether a protective oil or a stamping oil is used for the operation of the oiling, which shows that the properties tribological resulting from the treatment according to the invention are independent of the oil used
- the purpose of this example is to illustrate a preferred embodiment of the invention according to which the average number m of ethylene oxide radicals in the molecule of the treatment product is between 30 and 150
- the tribological properties which are obtained after treatment of the metal surface according to the invention depend on the average number m of ethylene oxide radicals in the molecule of the treatment product.
- the tribological performances are lower for a value too low of m, while remaining superior to the treatments of the prior art for a value of m of the order of 30
- Example 3
- the purpose of this example is to illustrate the stability of the tribological performances provided by the treatment according to the invention, even after several weeks of storage.
- the purpose of this example is to illustrate the advantage provided by the surface treatment according to the invention when simultaneously seeking to improve the tribological properties and to protect the treated sheet metal against corrosion.
- test pieces are placed in an enclosure in a tight package, which simulates the conditions to which a wound sheet is subjected during a transport operation.
- the climatic cycle to which the package of test specimens is subjected is as follows: 10 h at 40 ° C and 95% humidity - 4 h at 20 ° C and 85% humidity - 10 h at -5 ° C and 0% humidity - 8h at 30 ° C and 85% humidity.
- test result - (1) or (2) - is obtained by observing the possible traces of corrosion of the test pieces - pitting and / or staining - and by classifying the observations on a 5-point scale: 0 for absence of pitting, 5 for a generalized stain.
- test results are identified according to the number of days of exposure - test (1) - or the number of climatic cycles - test (2).
- Tests are carried out on several types of test pieces: oiled without prior deposit ("without"), treated according to the prior art (P), treated according to the invention (X).
- test 1 The results obtained are reported in Tables VII (test 1) and VIII (test 2); Table V (test 1) shows, for information only, the results obtained on test pieces treated under the same conditions but not oiled. Tab. VI - Atmospheric corrosion tests) on non-oiled test pieces.
- the degreasability of the oiled test pieces is evaluated, on the one hand directly, on the other hand after a so-called "aging" treatment which consists in maintaining the test piece at 150 ° C. for 15 minutes
- the purpose of this example is to illustrate the improvement in the tribological properties obtained by the treatment according to the invention applied to coated steel sheets.
- This example also aims to illustrate the impact of the concentration of ethoxylates in the treatment solution according to the invention on the improvement of the tribological properties.
- the purpose of this example is finally to illustrate the tribological performances which are obtained on a surface treated with a lanosterol ethoxylate solution, dried but not oiled.
- the curves A, B, C and D of FIG. 7 correspond to the results of the tribological tests respectively for the test pieces of type A, B, C and D.
- the tests are carried out according to the procedure (1) of Example 1 (F s variable), with the difference that the clamping force remains in the range 80 - 800 daN.
- Curve D shows that good tribological properties are also obtained even if the oil is not oiled after the deposition of ethoxylate.
- the purpose of this example is to illustrate the impact of the surface density of dry deposition of lanosterol ethoxylate according to the invention on the tribological properties. From BS2 grade steel, four types of A specimens are prepared,
- the curves A, B, C and D of FIG. 8 correspond to the results of the tribological tests respectively for the test pieces of type A, B, C and D
- the purpose of this example is to illustrate the impact of the addition of sequestering agent (iron ions) in the solution of treatment product according to the invention on the elimination of the risks of yellowing of the sheets treated according to the invention.
- HEDTA-Na 3 hydroxy-ethyl-ethylene-diamine-acetic acid
- test specimens treated according to the invention are then subjected to the exposure of sunlight during the same period, at the end of which their yellowing or "yellow index" is measured, by a colo ⁇ mét ⁇ que method known in itself.
- the yellow index is deduced from the t ⁇ chromatic coordinates measured in the CIE-LAB colo ⁇ mét ⁇ e scale using a LMG 083 colo ⁇ meter from the company "Microcolor Do Budapest Lange" The extreme values measured here range from almost 0 (no yellowing) to 8 (strong yellowing)
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Chemical Treatment Of Metals (AREA)
- Lubricants (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Laminated Bodies (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9514834A FR2742364B1 (fr) | 1995-12-14 | 1995-12-14 | Procede de traitement de surface d'une tole metallique pour emboutissage |
FR9514834 | 1995-12-14 | ||
PCT/FR1996/001979 WO1997021793A1 (fr) | 1995-12-14 | 1996-12-11 | Procede de traitement de la surface metallique d'une tole |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0873386A1 true EP0873386A1 (fr) | 1998-10-28 |
EP0873386B1 EP0873386B1 (fr) | 2001-03-21 |
Family
ID=9485505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96942385A Expired - Lifetime EP0873386B1 (fr) | 1995-12-14 | 1996-12-11 | Procede de traitement de la surface metallique d'une tole |
Country Status (8)
Country | Link |
---|---|
US (1) | US5997955A (fr) |
EP (1) | EP0873386B1 (fr) |
AT (1) | ATE199931T1 (fr) |
CA (1) | CA2238840C (fr) |
DE (1) | DE69612217T2 (fr) |
ES (1) | ES2156304T3 (fr) |
FR (1) | FR2742364B1 (fr) |
WO (1) | WO1997021793A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2767140B1 (fr) * | 1997-08-07 | 1999-10-29 | Lorraine Laminage | Procede de traitement de surface de pieces metalliques |
FR2787355B1 (fr) * | 1998-12-22 | 2002-01-18 | Lorraine Laminage | Procede de traitement de surfaces metalliques, notamment de toles d'acier, destine en particulier a ameliorer leurs performances tribologiques |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB380431A (en) * | 1931-04-10 | 1932-09-12 | James Yate Johnson | Improvements in the manufacture and production of assistants in the textile and related industries and dispersing agents |
US2578585A (en) * | 1949-08-11 | 1951-12-11 | Gilron Products Company | Composition for forming a dry, homogeneous, self-adherent lubricating film on metal stock |
GB774511A (en) * | 1952-07-24 | 1957-05-08 | Textile Oils Ltd | Improvements in and relating to the lubrication of textile fibres and textile processing machinery and the manufacture of lubricants suitable therefor |
FR1259134A (fr) * | 1959-05-22 | 1961-04-21 | Lubrifiant pour le travail des métaux | |
US3873458A (en) * | 1973-05-18 | 1975-03-25 | United States Steel Corp | Resin-containing lubricant coatings |
DE2341577B1 (de) * | 1973-08-17 | 1974-12-05 | Texaco Ag | Hochleistungsziehoel |
US4787995A (en) * | 1985-05-03 | 1988-11-29 | Chem-Trend, Incorporated | Lanolin containing metalworking fluids and concentrates |
US4752405A (en) * | 1986-05-01 | 1988-06-21 | Coral Chemical Company | Metal working lubricant |
JPS6388085A (ja) * | 1986-10-02 | 1988-04-19 | Toyo Kohan Co Ltd | めつき鋼板の後処理方法 |
US4859351A (en) * | 1987-06-01 | 1989-08-22 | Henkel Corporation | Lubricant and surface conditioner for formed metal surfaces |
JPH01290778A (ja) * | 1988-05-19 | 1989-11-22 | Toyo Kohan Co Ltd | めっき鋼板の後処理方法 |
US5011711A (en) * | 1989-07-18 | 1991-04-30 | Toyo Kohan Co., Ltd. | Method for post-treatment of electroplated steel sheets for soldering |
FR2651700B1 (fr) * | 1989-09-11 | 1994-10-14 | Lorraine Laminage | Procede d'emboutissage d'un flan de tole metallique. |
JP3092423B2 (ja) * | 1993-12-01 | 2000-09-25 | 株式会社コスモ総合研究所 | 新規塑性加工コート剤組成物 |
JPH0848937A (ja) * | 1994-08-04 | 1996-02-20 | Cosmo Oil Co Ltd | 新規塑性加工コート剤組成物 |
-
1995
- 1995-12-14 FR FR9514834A patent/FR2742364B1/fr not_active Expired - Fee Related
-
1996
- 1996-12-11 US US09/091,232 patent/US5997955A/en not_active Expired - Lifetime
- 1996-12-11 CA CA 2238840 patent/CA2238840C/fr not_active Expired - Fee Related
- 1996-12-11 EP EP96942385A patent/EP0873386B1/fr not_active Expired - Lifetime
- 1996-12-11 WO PCT/FR1996/001979 patent/WO1997021793A1/fr active IP Right Grant
- 1996-12-11 AT AT96942385T patent/ATE199931T1/de active
- 1996-12-11 ES ES96942385T patent/ES2156304T3/es not_active Expired - Lifetime
- 1996-12-11 DE DE69612217T patent/DE69612217T2/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9721793A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2742364B1 (fr) | 1998-01-09 |
CA2238840C (fr) | 2007-03-20 |
WO1997021793A1 (fr) | 1997-06-19 |
CA2238840A1 (fr) | 1997-06-19 |
ES2156304T3 (es) | 2001-06-16 |
DE69612217T2 (de) | 2001-11-15 |
DE69612217D1 (de) | 2001-04-26 |
US5997955A (en) | 1999-12-07 |
FR2742364A1 (fr) | 1997-06-20 |
ATE199931T1 (de) | 2001-04-15 |
EP0873386B1 (fr) | 2001-03-21 |
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